Set & Forget Quartz Clock Movement - Battery Powered, 3/16 Maximum Dial Thickness Automatically springs forward / falls back for Daylight Saving Time changes No radio signals required, pre-programmed until the year 2098 3/16" Maximum Dial Thickness; 11/16" Total Hand Shaft Length 5/16" Shaft Diameter Case Size: 2 7/32" Square x 5/8" Depth